Given the task definition and input, reply with output. You are given a math word problem and you are supposed to apply a single mathematical operator like addition, subtraction, multiplication, or division on the numbers embedded in the text to answer the following question and then only report the final numerical answer.

1 zoo guide spoke to a group of 19 children . another guide spoke to a group of 25 children . there are 22 guides at the zoo . how many children did the zoo guides speak to ?
44