pile of goods, the first shipment (3/5), is exactly 90 tons, and the second shipment is 20%, how many tons is the second shipment?
一堆货物，第一次运走(3/5)，正好是90吨，第二次运走20%，第二次运走多少吨？
<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">90 / (3/5)</gadget>
<output>150</output>

<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">150 * (1/5)</gadget>
<output>30</output>

<result>30</result>