Two kinds of balls are brought into the store. The known number of footballs (4/7) is exactly equal to the number of basketballs. There are 84 footballs. How many basketballs and footballs are there?
商店运进两种球，已知足球个数的(4/7)正好和篮球的个数相等，足球是84个，篮球和足球共有多少个？
<gadget id="calculator">4 / 7</gadget>
<output>4/7 = around 0.571429</output>

<gadget id="calculator">84 * (4/7)</gadget>
<output>48</output>

<gadget id="calculator">48 + 84</gadget>
<output>132</output>

<result>132</result>