The younger brother is 120 cm tall and shorter than the elder brother (1/6), what is the correct formula to calculate the height of the elder brother
弟弟身高120厘米，比哥哥矮(1/6)，计算哥哥身高的正确式子多少
<gadget id="calculator">1 / 6</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">1 - (1/6)</gadget>
<output>5/6 = around 0.833333</output>

<gadget id="calculator">120 / (5/6)</gadget>
<output>144</output>

<result>144</result>