The ratio of work efficiency between A and B is 7:5. The two work together to make 360 parts. How many parts does B make?
甲、乙工效的比是7：5，两人合做360个零件，乙做了多少个．
<gadget id="calculator">7 + 5</gadget>
<output>12</output>

<gadget id="calculator">5 / 12</gadget>
<output>5/12 = around 0.416667</output>

<gadget id="calculator">360 * (5/12)</gadget>
<output>150</output>

<result>150</result>