The school cafeteria bought some potatoes and ate (3/4) and there are 90 kilograms left. How many kilograms are these potatoes?
学校食堂买来一些土豆，已经吃了(3/4)，还剩90千克，这些土豆有多少千克？
<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">1 - (3/4)</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">90 / (1/4)</gadget>
<output>360</output>

<result>360</result>