Sentence:  Then I <WSD>calculated</WSD> that a million peas would just about fill a household refrigerator ; a billion peas would fill a small house from cellar to attic ; a trillion peas would fill all the houses in a town of about ten thousand people ; and a quadrillion peas would fill all the buildings in the city of Philadelphia . 
Meaning of the word marked with <WSD> tags:  make a mathematical calculation or computation