There are 2,700 parts in a batch, and they are divided between A and B according to the ratio of 4:5. How many parts should B make?
一批零件有2700个，按4：5分给甲和乙完成，乙要做多少个零件？
<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_700 * (5/9)</gadget>
<output>1_500</output>

<result>1_500</result>