There are 1,200 tons of cement in the warehouse, 30% of which were transported away in the first time, and the same amount was transported away in the second time. How many tons of cement are left in the warehouse?
仓库有水泥1200吨，第一次运走了30%，第二次运走的和第一次同样多．仓库还剩下水泥多少吨？
<gadget id="calculator">30 / 100</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">1 - (3/10) - (3/10)</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">1_200 * (2/5)</gadget>
<output>480</output>

<result>480</result>