The number of students in my class today is 45, and the absence rate is 10%. How many people did not come today?
今天我班到校学生人数为45人，缺勤率为10%，今天有多少人没来？
<gadget id="calculator">10 / 100</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">1 - (1/10)</gadget>
<output>9/10 = around 0.9</output>

<gadget id="calculator">45 / (9/10)</gadget>
<output>50</output>

<gadget id="calculator">50 - 45</gadget>
<output>5</output>

<result>5</result>