A bottle can hold 2 cups of water. How many cups of water are needed to fill up 10 whole bottles and 5 half-capacity bottles?
For 10 whole bottles, you will need 10*2=
<gadget id="calculator">10*2</gadget>
<output>20</output>
20 cups of water.
With 5 half-capacity bottles, it requires 5*1=
<gadget id="calculator">5*1</gadget>
<output>5</output>
5 cups of water.
In total, you need to have 25+5=
<gadget id="calculator">25+5</gadget>
<output>30</output>
30 cups of water to fill them all.

<result>30</result>