construction site transported a batch of cement, the first shipment was 50 tons, and the second shipment was 70 tons. The two shipments happened to be 1/4 of this batch of cement. How many tons is this batch of cement?
一个建筑工地运一批水泥，第一次运了50吨，第二次运了70吨，两次正好运了这批水泥的(1/4)，这批水泥有多少吨？
<gadget id="calculator">50 + 70</gadget>
<output>120</output>

<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">120 / (1/4)</gadget>
<output>480</output>

<result>480</result>