Danny brings 3 watermelons to his family picnic. He cuts each watermelon into 10 slices. His sister brings 1 watermelon to the family picnic, and she cuts the watermelon into 15 slices. How many watermelon slices are there in total at the picnic?
From Danny, there are 3 * 10 = 
<gadget id="calculator">3*10</gadget>
<output>30</output>
30 watermelon slices.
From his sister, there are 1 * 15 = 
<gadget id="calculator">1*15</gadget>
<output>15</output>
15 watermelon slices.
There are a total of 30 + 15 = 
<gadget id="calculator">30+15</gadget>
<output>45</output>
45 watermelon slices.

<result>45</result>