There are 84 footballs in Hongqi Primary School, and 12 less basketballs than twice as many footballs. How many basketballs are there?
红旗小学有足球84只，篮球的只数比足球的2倍少12只，篮球有多少只？
<gadget id="calculator">84 * 2</gadget>
<output>168</output>

<gadget id="calculator">168 - 12</gadget>
<output>156</output>

<result>156</result>