Steve owns a lake shop that sells fish. He has a stock of 200 fish. He sells 50 fish and because his refrigerators stop working a third of the remaining fish become spoiled. A new stock of 200 more fish arrives. How many fish does he have in stock now?
If he had 200 fish and sells 50, he is left with 200 - 50 = 
<gadget id="calculator">200-50</gadget>
<output>150</output>
150 fish.
If a third of them get spoiled 1/3 * 150 = 
<gadget id="calculator">150*1/3</gadget>
<output>50</output>
50 fish get spoiled.
The remaining number of fish is now 150 - 50 = 
<gadget id="calculator">150-50</gadget>
<output>100</output>
100.
He then gets 200 more to make 100 + 200 = 
<gadget id="calculator">100+200</gadget>
<output>300</output>
300 fish.

<result>300</result>