The fruit shop brings in a batch of watermelons, and after selling (1/3), there are 60 left. How many watermelons are in this batch?
水果店运进一批西瓜，卖了(1/3)后，还剩60个，这批西瓜共多少个？
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">1 - (1/3)</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">60 / (2/3)</gadget>
<output>90</output>

<result>90</result>