Xiao Hua can type 90 words per minute, which is 1/5 more than Xiao Ming. How many words can Xiao Ming type per minute?
小华用电脑打字，每分钟能打90个，比小明多(1/5)，小明每分钟能打多少个字？
<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">90 / (6/5)</gadget>
<output>75</output>

<result>75</result>