The school has 120 boxes of colored chalk, which is less than white chalk (3/5). How many boxes of chalk are there in the school?
学校有120盒彩粉笔，比白粉笔少(3/5)，学校共有粉笔多少盒？
<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">1 - (3/5)</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">120 / (2/5)</gadget>
<output>300</output>

<gadget id="calculator">300 + 120</gadget>
<output>420</output>

<result>420</result>