Master Liu produced a batch of parts, and produced 128 parts in 4 days. In this way, how many days will it take to produce 224 parts? (answer in two ways)
刘师傅生产一批零件，4天生产了128个，照这样，要生产224个零件，需要多少天？(用两种方法解答)
<gadget id="calculator">128 / 4</gadget>
<output>32</output>

<gadget id="calculator">224 / 32</gadget>
<output>7</output>

<result>7</result>