The average score of Ning Ning's three long jumps was 170 centimeters, and the fourth jump was 174 centimeters. So what is the average score of his quadruple jump in centimeters?
宁宁三次跳远的平均成绩是170厘米，第四次跳了174厘米．那么他四次跳远的平均成绩是多少厘米．
<gadget id="calculator">170 * 3</gadget>
<output>510</output>

<gadget id="calculator">510 + 174</gadget>
<output>684</output>

<gadget id="calculator">684 / 4</gadget>
<output>171</output>

<result>171</result>