There are a number of balls in the pocket, among which the red balls account for (5/12), and later 8 red balls are placed, at this time the red balls account for (1/2) of the total. So how many balls are in the bag now?
口袋里有若干球，其中红球占了(5/12)，后来又放了8个红球，这时红球占了总数的(1/2)．那么现在袋子里有几个球？
<gadget id="calculator">7 / 12</gadget>
<output>7/12 = around 0.583333</output>

<gadget id="calculator">5 / 12</gadget>
<output>5/12 = around 0.416667</output>

<gadget id="calculator">(7/12) - (5/12)</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">8 / (1/6)</gadget>
<output>48</output>

<gadget id="calculator">48 + 8</gadget>
<output>56</output>

<result>56</result>