A batch of fruit was shipped from the Happy Store. The first day sold this batch of fruit (9/20), and the second day sold 105 kilograms. There are still this batch of fruit (3/8), how many kilograms of this batch of fruit are there in total? ?
快乐商店运来一批水果，第一天卖出这批水果的(9/20)，第二天卖出105千克，还剩这批水果的(3/8)，这批水果一共有多少千克？
<gadget id="calculator">9 / 20</gadget>
<output>9/20 = around 0.45</output>

<gadget id="calculator">3 / 8</gadget>
<output>3/8 = around 0.375</output>

<gadget id="calculator">1 - (9/20) - (3/8)</gadget>
<output>7/40 = around 0.175</output>

<gadget id="calculator">105 / (7/40)</gadget>
<output>600</output>

<result>600</result>