Xiaohua has enough money to buy 6 basketballs, 16 footballs, or 9 basketballs. Now Xiaohua bought all the money for footballs and gave them to children in impoverished mountainous areas. How many footballs did Xiao Hua buy in total?
小华有的钱可以买6个蓝球、16个足球，或买9个蓝球．现在小华把这些钱全部买了足球，送给贫困山区小朋友．小华共买了足球多少个．
<gadget id="calculator">9 - 6</gadget>
<output>3</output>

<gadget id="calculator">9 / 3</gadget>
<output>3</output>

<gadget id="calculator">16 * 3</gadget>
<output>48</output>

<result>48</result>