A team's current winning rate is 45%. If it wins 6 games in the next 8 games, the winning rate will increase to 50%. So how many games has the team won now?
某支球队现在的胜率为45%，接下来的8场比赛中若有6场获胜，则胜率将提高到50%．那么现在这支球队共取得了多少场比赛的胜利．
<gadget id="calculator">6 - 4</gadget>
<output>2</output>

<gadget id="calculator">0.5 - 0.45</gadget>
<output>0.05</output>

<gadget id="calculator">2 / 0.05</gadget>
<output>40</output>

<gadget id="calculator">45 / 100</gadget>
<output>9/20 = around 0.45</output>

<gadget id="calculator">40 * (9/20)</gadget>
<output>18</output>

<result>18</result>