What is the quotient of the difference obtained by subtracting the product of 40 and 3 from 150 and dividing by 4500?
150减去40与3的积所得的差去除4500，商是多少？
<gadget id="calculator">40 * 3</gadget>
<output>120</output>

<gadget id="calculator">150 - 120</gadget>
<output>30</output>

<gadget id="calculator">4_500 / 30</gadget>
<output>150</output>

<result>150</result>