Convenience Fruit Supermarket brings in a batch of apples, sells (1/4) of the total mass of apples on the first day, sells the rest (1/3) on the second day, and sells the rest (1/2) on the third day, At this time, there are 120 kilograms left. How many kilograms are there in total for this batch of apples?
便民水果超市运进一批苹果，第一天卖出苹果总质量的(1/4)，第二天卖出余下的(1/3)，第三天卖出余下的(1/2)，这时，还剩下120千克，这批苹果一共多少千克？
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">1 - (1/2)</gadget>
<output>1/2 = around 0.5</output>

<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">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 - (1/4)</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">120 / (1/2) / (2/3) / (3/4)</gadget>
<output>480</output>

<result>480</result>