The construction site transported 20 tons of stones, and the sand transported was less than the number of stones (2/5), how many tons more stones were transported than the sand?
建筑工地运来石头20吨，运来的沙比石头的吨数少(2/5)，运来的石头比沙多多少吨？
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">20 * (2/5)</gadget>
<output>8</output>

<result>8</result>