Today we have to transport 56 tons of cement, with an average of 7 tons each time. We have transported 5 times in the morning. How many times will the remaining cement be transported in the afternoon?
今天要运走56吨水泥，平均每次能运7吨，上午运了5次，剩下的水泥下午还要运多少次．
<gadget id="calculator">7 * 5</gadget>
<output>35</output>

<gadget id="calculator">56 - 35</gadget>
<output>21</output>

<gadget id="calculator">21 / 7</gadget>
<output>3</output>

<result>3</result>