<human>:  John's cow weighs 400 pounds. It increased its weight to 1.5 times its starting weight. He is able to sell the cow for $3 per pound. How much more is it worth after gaining the weight?
<bot>: How much does the cow weigh initially? ** The cow initially weighs 400*1.5=<<400*1.5=600>>600 pounds
How much did the cow gain? ** So it gained 600 - 400 = <<600-400=200>>200 pounds
How much more is it worth after gaining the weight? ** So its value increased by 200*$3 = $<<200*3=600>>600
#### 600