Xiao Ming spent 150 yuan this month, which is 1/5 more than last month. How much did he spend last month?
小明这个月用150元钱，比上个月多用(1/5)，他上个月用多少元钱？
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 + (1/5)</gadget>
<output>6/5 = around 1.2</output>

<gadget id="calculator">150 / (6/5)</gadget>
<output>125</output>

<result>125</result>