The average height of Class 6 and Class 2 is 149 cm. If the average height is recorded as "0", then what should Xiao Ming's height of 156 cm be recorded as?
六2班的平均身高是149厘米，如果把平均身高记作"0"，那么小明身高156厘米应记作多少．
<gadget id="calculator">156 - 149</gadget>
<output>7</output>

<result>7</result>