A pile of cargo (1/4) is transported on the first day, and the rest (1/3) is transported on the second day. If the total cargo is 400 tons, how many tons are left?
一堆货物第一天运走它的(1/4)，第二天运走余下的(1/3)，如果这雄货物共400吨，还剩多少吨没有运走？
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 - (1/4)</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">(3/4) * (1/3)</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 - (1/4) - (1/4)</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">400 * (1/2)</gadget>
<output>200</output>

<result>200</result>