Xiao Ming is a well-known "little mathematician". He went to the store to buy a football and a basketball. The aunt of the salesperson wants to test him and tell him: If you buy 6 footballs and 3 basketballs, you need to pay 294 yuan; if you buy 2 footballs and 3 basketballs, you only need to pay 154 yuan. Xiao Ming thought for a while, and quickly figured out how much he would have to pay.
小明是个远近闻明的"小数学家"，他到商店要买一个足球和一个篮球．售货员阿姨要考考他，告诉他：如果买6个足球和3个篮球需要付294元；而如果买2个足球和3个篮球只要付154元．小明想了一下，很快就算出他要付多少元．
<gadget id="calculator">294 - 154</gadget>
<output>140</output>

<gadget id="calculator">6 - 2</gadget>
<output>4</output>

<gadget id="calculator">140 / 4</gadget>
<output>35</output>

<gadget id="calculator">35 * 6</gadget>
<output>210</output>

<gadget id="calculator">294 - 210</gadget>
<output>84</output>

<gadget id="calculator">84 / 3</gadget>
<output>28</output>

<gadget id="calculator">35 + 28</gadget>
<output>63</output>

<result>63</result>