The canteen shipped 720 kilograms of rice, 25% of the total was eaten in the first week, and 3/8 of the total was eaten in the second week. How many kilograms of rice are left?
食堂运来720千克大米，第一周吃了总数的25%，第二周吃了总数的(3/8)，还剩多少千克大米？
<gadget id="calculator">25 / 100</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">3 / 8</gadget>
<output>3/8 = around 0.375</output>

<gadget id="calculator">1 - (1/4) - (3/8)</gadget>
<output>3/8 = around 0.375</output>

<gadget id="calculator">720 * (3/8)</gadget>
<output>270</output>

<result>270</result>