Xiao Zhang sent 1,000 flower pots to the flower shop. If you send one, you will get 30 cents for shipping. If you damage one, you will not be charged 50 cents for shipping. After delivery, you will be charged 260 yuan for shipping.
小张为花店送1000只花盆，送一只可得运费3角，损坏一只不仅不得运费还要赔5角，运完后得运费260元，运输中损坏了多少只．
<gadget id="calculator">0.3 * 1_000</gadget>
<output>300</output>

<gadget id="calculator">300 - 260</gadget>
<output>40</output>

<gadget id="calculator">0.5 + 0.3</gadget>
<output>0.8</output>

<gadget id="calculator">40 / 0.8</gadget>
<output>50</output>

<result>50</result>