A bag of potatoes, 1/3 of it is eaten, and 30 kg is eaten, how many kg does this bag of potatoes have?
一袋土豆，吃了它的(1/3)，吃了30千克，这袋土豆原有多少千克．
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">30 / (1/3)</gadget>
<output>90</output>

<result>90</result>