A glass of milk is 8 ounces of milk.  John drinks 2 glasses of milk.  If milk has 3 calories per ounce how many calories did he consume?
He drank 8*2=
<gadget id="calculator">8*2</gadget>
<output>16</output>
16 ounces of milk.
So he drank 16*3=
<gadget id="calculator">16*3</gadget>
<output>48</output>
48 calories of milk.

<result>48</result>