A pile of 20 tons of goods, use (3/4), how many tons are used
一堆货物20吨，用去(3/4)，用去多少吨
<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">20 * (3/4)</gadget>
<output>15</output>

<result>15</result>