Buying a basketball costs 35 yuan, and a football costs 15 yuan more than a basketball. The money Mr. Li brought was just enough to buy 10 basketballs. If you use this money to buy footballs, how many can you buy?
买1个篮球要35元，1个足球比1个篮球贵15元．李老师带的钱刚好能买10个篮球．如果用这些钱买足球，可以买多少个？
<gadget id="calculator">35 + 15</gadget>
<output>50</output>

<gadget id="calculator">35 / 50</gadget>
<output>7/10 = around 0.7</output>

<gadget id="calculator">10 * (7/10)</gadget>
<output>7</output>

<result>7</result>