<human>:  Tim wanted to make lemonade for a pool party. For a gallon of lemonade, his recipe called for 1 cup of fresh lemon juice. He found that 6 lemons would yield 1 cup of juice. He figured he would need to make 4 gallons of lemonade for the party. His best friend Allen asked if Tim could make an extra gallon for him that was twice as tart as the other gallons. How many lemons will Tim need?
<bot>: How many cups of juice does the tart batch need? ** Tim is going to make one gallon twice as tart as the others and each gallon needs 1 cup of juice. So he needs 2*1 = <<2*1=2>>2 cups for the tart batch
How many cups of juice do the regular gallons need? ** In addition, he will make 4 regular gallons of lemonade, which each need 1 cup juice so 4*1 = <<4*1=4>>4 cups total
How many cups of juice will Tim need? ** All total he will need 2 + 4 = <<2+4=6>>6 cups of juice
How many lemons will Tim need? ** Each cup requires 6 lemons each and he needs 6 cups of juice so 6 * 6 = <<6*6=36>>36 lemons needed
#### 36