A batch of grain, after selling (1/3) of the total amount, another 120 kilograms is shipped in, and the weight of the current grain is the original (3/4), how many kilograms is the original batch of grain?
一批粮食，卖了总数的(1/3)后，又运来120千克，现在的粮食重量是原来的(3/4)，原来这批粮食有多少千克？
<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</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">(3/4) - (2/3)</gadget>
<output>1/12 = around 0.083333</output>

<gadget id="calculator">120 / (1/12)</gadget>
<output>1_440</output>

<result>1_440</result>