Put a batch of oranges into the same box, 60% of this batch of oranges can be packed in 5 boxes, and there are 20 more oranges, and the rest and the previous fractions can be packed into 4 boxes. How many oranges are there in total?
将一批橘子装进同样的箱子，这批橘子的60%可装5箱，还多20只，将剩下的和前面的零头一起正好装4箱．这批橘子一共多少只．
<gadget id="calculator">100 + 80</gadget>
<output>180</output>

<gadget id="calculator">2.4 - 2</gadget>
<output>0.4</output>

<gadget id="calculator">180 / 0.4</gadget>
<output>450</output>

<result>450</result>