5 workers process 2250 parts in 6 days. According to this calculation, how many more workers are needed to process 3150 parts in the same number of days?
5名工人6天加工零件2250个，照这样计算，要在相同的天数内加工3150个零件，需要增加多少名工人？
<gadget id="calculator">2_250 / 5</gadget>
<output>450</output>

<gadget id="calculator">3_150 / 450</gadget>
<output>7</output>

<gadget id="calculator">7 - 5</gadget>
<output>2</output>

<result>2</result>