In the first three batting games, Wang Xin scored 139, 143, and 144 respectively. In order to make the average score of the first 4 games 145, how many points should she get in the fourth game?
在前三场击球游戏中，王新同学得分分别为139，143，144，为使前4场的平均得分为145，第四场她应得多少分．
<gadget id="calculator">145 * 4</gadget>
<output>580</output>

<gadget id="calculator">139 + 143 + 144</gadget>
<output>426</output>

<gadget id="calculator">580 - 426</gadget>
<output>154</output>

<result>154</result>