Mary has 30 sheep. She gets 1 kg of milk from half of them and 2 kg of milk from the other half every day. How much milk does she collect every day?
Half of the sheep is 30 / 2 = 
<gadget id="calculator">30/2</gadget>
<output>15</output>
15.
Mary gets (15 * 1) + (15 * 2) = 
<gadget id="calculator">15*1+15*2</gadget>
<output>45</output>
45 kg of milk every day.

<result>45</result>