There are 2,700 parts in a batch, A has already made 540, and the rest will be divided between B and C according to the ratio of 4:5. How many parts should C make?
一批零件有2700个，甲已经做了540个，剩下的按4：5分给乙和丙完成，丙要做多少个零件？
<gadget id="calculator">2_700 - 540</gadget>
<output>2_160</output>

<gadget id="calculator">4 + 5</gadget>
<output>9</output>

<gadget id="calculator">5 / 9</gadget>
<output>5/9 = around 0.555556</output>

<gadget id="calculator">2_160 * (5/9)</gadget>
<output>1_200</output>

<result>1_200</result>