The school bought 20 basketballs and 20 volleyballs. It is known that the unit price of the basketball is 65 yuan, and the unit price of the volleyball is 35 yuan. How much is the total cost of buying the ball?
学校买来篮球和排球各20个，已知篮球的单价是65元，排球的单价是35元，这次买球共用多少元？
<gadget id="calculator">65 + 35</gadget>
<output>100</output>

<gadget id="calculator">100 * 20</gadget>
<output>2_000</output>

<result>2_000</result>