<human>:  When Freda cooks canned tomatoes into sauce, they lose half their volume. Each 16 ounce can of tomatoes that she uses contains three tomatoes. Freda’s last batch of tomato sauce made 32 ounces of sauce. How many tomatoes did Freda use?
<bot>: How many ounces of tomatoes did Freda start with? ** Tomatoes lose half their volume when made into sauce, so Freda started with 32 * 2 = <<32*2=64>>64 ounces of tomatoes.
How many cans of tomatoes did Freda use? ** At 16 ounces per can, she used 64 / 16 = <<64/16=4>>4 cans of tomatoes.
How many tomatoes did Freda use? ** At 3 tomatoes a can, Freda used 3 * 4 = <<3*4=12>>12 tomatoes.
#### 12