A worker produced 242 parts in 28 days, which was 18 more than the original plan. How many parts were originally planned to be produced per day?
一个工人28天生产了242个零件，比原计划多生产了18个，原计划每天生产多少个零件？
<gadget id="calculator">242 - 18</gadget>
<output>224</output>

<gadget id="calculator">224 / 28</gadget>
<output>8</output>

<result>8</result>