A batch of fruit came from the fruit shop. Sell 25% of the total on the first day, sell 160 kg on the second day, and the ratio of the rest to the sold weight is 1:3. How many kilograms is this batch of fruit in total?
水果店运来一批水果．第一天卖出总数的25%，第二天卖出160千克，剩下的与卖出的重量的比是1：3．这批水果共有多少千克？
<gadget id="calculator">1 + 3</gadget>
<output>4</output>

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

<gadget id="calculator">1 - (1/4) - (1/4)</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">160 / (1/2)</gadget>
<output>320</output>

<result>320</result>