Minwei Mall originally had 150 TV sets, sold 30 sets on the eve of the National Day, sold the rest (3/5) during the National Day, and bought new TVs after the holiday (3/4), Minwei Mall How many TVs do you have?
民威商场原有电视机150台，国庆节前夕卖出30台，国庆节期间又卖出余下的(3/5)，节后又新进现有电视的(3/4)，民威商场现有电视多少台？
<gadget id="calculator">150 - 30</gadget>
<output>120</output>

<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">1 - (3/5)</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">1 + (3/4)</gadget>
<output>7/4 = around 1.75</output>

<gadget id="calculator">120 * (2/5) * (7/4)</gadget>
<output>84</output>

<result>84</result>