The grade 4 teachers have decided to have a parade around the neighbourhood. To make it special, we are going to use a special formation. One person will be in the first row, two people in the second row, three people in the third row, and so on. If it takes ten complete rows for all of the grade 4 students to walk in the parade, how many total students are in grade 4?
Show your answer using words, number, a table or picture.