A cup of mushrooms weighs 100 grams and has 3 grams of protein.  If John eats 200 grams of mushrooms every day how many grams of protein does he get per week?
He eats 200/100=
<gadget id="calculator">200/100</gadget>
<output>2</output>
2 cups per day.
So that means he gets 2*3=
<gadget id="calculator">6</gadget>
<output>6</output>
6 grams of protein per day.
So he gets 6*7=
<gadget id="calculator">6*7</gadget>
<output>42</output>
42 grams of protein per week.

<result>42</result>