The number of male employees in a workshop is 3/4 of the number of female employees. Due to support for key projects, 33 male employees were investigated and left. At this time, the ratio of male and female employees was 4:9. How many male employees were there in this workshop?
一个车间男职人数是女职工人数的(3/4)，因支援重点工程，调查走男职工33人，这时男、女职工人数的比是4：9，这个车间原来男职工多少人？
<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">4 / 9</gadget>
<output>4/9 = around 0.444444</output>

<gadget id="calculator">(3/4) - (4/9)</gadget>
<output>11/36 = around 0.305556</output>

<gadget id="calculator">33 / (11/36)</gadget>
<output>108</output>

<gadget id="calculator">108 * (3/4)</gadget>
<output>81</output>

<result>81</result>