Use three trucks to transport 730 tons of cement to the construction site. It is known that the first truck transports 40 tons more than the second truck, and the third truck transports half of the second truck. So how many tons does the second truck carry?
用三辆卡车运730吨水泥到工地去，已知第一辆比第二辆多运40吨，第三辆运的是第二辆的一半．那么第二辆卡车运多少吨？
<gadget id="calculator">730 - 40</gadget>
<output>690</output>

<gadget id="calculator">0.5 + 1 + 1</gadget>
<output>2.5</output>

<gadget id="calculator">690 / 2.5</gadget>
<output>276</output>

<result>276</result>