Only 36 people from Class 5 and 4 came to school on a certain day, and the attendance rate was 90%. How many people did not show up?
五4班某天只有36人到校，出勤率是90%，没到的有多少人．
<gadget id="calculator">90 / 100</gadget>
<output>9/10 = around 0.9</output>

<gadget id="calculator">36 / (9/10)</gadget>
<output>40</output>

<gadget id="calculator">40 - 36</gadget>
<output>4</output>

<result>4</result>