A batch of goods, 20 pieces per box, requires 42 boxes. How many boxes are needed if there are 4 more pieces per box?
一批货物，每箱装20件，需要42只箱子．如果每箱多装4件，需要多少只箱子？
<gadget id="calculator">20 + 4</gadget>
<output>24</output>

<gadget id="calculator">42 / 24</gadget>
<output>7/4 = around 1.75</output>

<gadget id="calculator">20 * (7/4)</gadget>
<output>35</output>

<result>35</result>