40% of a farmer's cattle are males. The rest are females. If a female cow produces 2 gallons of milk a day, how much milk will the farmer get a day if he has 50 male cows?
The farmer has 125 cows because 50 / .4 = 
<gadget id="calculator">50/.4</gadget>
<output>125</output>
125.
The farmer has 75 female cows because 125 x .6 = 
<gadget id="calculator">125*.6</gadget>
<output>75</output>
75.
The farmer will get 150 gallons of milk a day because 75 x 2 = 
<gadget id="calculator">75*2</gadget>
<output>150</output>
150.

<result>150</result>