Divide a batch of machine parts equally among three groups A, B and C, and each group can get 90 parts. If the number of people in each group is divided according to the ratio of 2:3:4, how many parts can be divided into group C.
将一批机器零件平均分给甲、乙、丙三个组，每组可分得90个，如果按照各组人数比2：3：4来分，那么丙组可分得多少零件．
<gadget id="calculator">90 * 3</gadget>
<output>270</output>

<gadget id="calculator">2 + 3 + 4</gadget>
<output>9</output>

<gadget id="calculator">4 / 9</gadget>
<output>4/9 = around 0.444444</output>

<gadget id="calculator">270 * (4/9)</gadget>
<output>120</output>

<result>120</result>