Make a batch of toys, plan to make 160 toys a day, and it will take 35 days to complete. Actually do 200 per day, how many days less than planned?
做一批玩具，计划每天做160个，要35天完成．实际每天做200个，实际比计划少用几天？
<gadget id="calculator">35 / 200</gadget>
<output>7/40 = around 0.175</output>

<gadget id="calculator">160 * (7/40)</gadget>
<output>28</output>

<gadget id="calculator">35 - 28</gadget>
<output>7</output>

<result>7</result>