Find the ratio: 4 decimeters: 24 centimeters = how much.
求比值：4分米：24厘米=多少．
<gadget id="calculator">4 * 10</gadget>
<output>40</output>

<gadget id="calculator">40 / 24</gadget>
<output>5/3 = around 1.666667</output>

<result>5/3 = around 1.666667</result>