The average result of Wang Li's four standing long jumps was 147 cm, and the results of the last three were 149 cm, 145 cm, and 142 cm. What was his first standing long jump score?
王力同学跳了四次立定跳远的平均成绩是147厘米，后三次的成绩分别是149厘米、145厘米、142厘米．他第一次立定跳远的成绩是多少？
<gadget id="calculator">147 * 4</gadget>
<output>588</output>

<gadget id="calculator">149 + 145 + 142</gadget>
<output>436</output>

<gadget id="calculator">588 - 436</gadget>
<output>152</output>

<result>152</result>