diff --git a/docs/examples/pi-montecarlo.md b/docs/examples/pi-montecarlo.md
index 8291620c..72a67114 100644
--- a/docs/examples/pi-montecarlo.md
+++ b/docs/examples/pi-montecarlo.md
@@ -50,10 +50,8 @@ This method of filling coordinate points, counting them, and using the differenc
 ## Monte Carlo approximation of _pi_
 
 ```blocks
-let pir = 0
-let pid = 0
+let pi = 0
 let y = 0
-let pin = 0
 let x = 0
 let r2 = 0
 let r = 0
@@ -87,10 +85,7 @@ basic.forever(() => {
     // r * r * pi => inside / n ~= (r*r*pi) / (4*r*r) ~=
     // pi / 4 pi = inside / n * 4
     //
-    pin = inside * 4
-    // only integer arithmetic here...
-    pid = pin / n
-    pir = pin % n
+    pi = (inside * 4) / n
     // show results
     basic.showLeds(`
         # # # # #
@@ -99,6 +94,6 @@ basic.forever(() => {
         . # . # .
         . # . . #
         `)
-    basic.showString(" " + pid + "." + pir)
+    basic.showString(" " + pi)
 })
 ```
\ No newline at end of file
diff --git a/docs/lessons/catch-the-egg-game/activity.md b/docs/lessons/catch-the-egg-game/activity.md
index a67321ea..be2e54e6 100644
--- a/docs/lessons/catch-the-egg-game/activity.md
+++ b/docs/lessons/catch-the-egg-game/activity.md
@@ -15,7 +15,7 @@ basic.forever(function() {
     led.plot(eggX, eggY)
     basic.pause(300)
     let accX = input.acceleration(Dimension.X)
-    basketX = 2 + Math.min(2, Math.max(-2, accX / 200))
+    basketX = 2 + Math.min(2, Math.max(-2, Math.idiv(accX, 200)))
     led.plot(basketX, 4)
     if (eggY > 4) {
         eggY = -1
@@ -46,7 +46,7 @@ basic.forever(function() {
     led.plot(eggX1, eggY1)
     basic.pause(300)
     let accX = input.acceleration(Dimension.X)
-    basketX1 = 2 + Math.min(2, Math.max(-2, accX / 200))
+    basketX1 = 2 + Math.min(2, Math.max(-2, Math.idiv(accX, 200)))
     led.plot(basketX1, 4)
     if (eggY1 > 4) {
         eggY1 = -1
@@ -85,7 +85,7 @@ basic.forever(function() {
     led.plot(eggX2, eggY2)
     basic.pause(300)
     let accX2 = input.acceleration(Dimension.X)
-    basketX2 = 2 + Math.min(2, Math.max(-2, accX2 / 200))
+    basketX2 = 2 + Math.min(2, Math.max(-2, Math.idiv(accX2, 200)))
     led.plot(basketX2, 4)
     if (eggY2 > 4) {
         eggY2 = -1
@@ -124,7 +124,7 @@ basic.forever(function() {
     led.plot(eggX3, eggY3)
     basic.pause(300)
     let accX3 = input.acceleration(Dimension.X)
-    basketX3 = 2 + Math.min(2, Math.max(-2, accX3 / 200))
+    basketX3 = 2 + Math.min(2, Math.max(-2, Math.idiv(accX3, 200)))
     led.plot(basketX3, 4)
     if (eggY3 > 4) {
         eggY3 = -1