Archie had two rolls of papers of the same length. He cut one roll into equal pieces of length 40 cm. In each piece he wrote 4 letters 'will' as shown in Figure 1. After that, he cut the other roll into equal pieces of length 1.1 m and and in each piece, he wrote 7 letters 'prevail' as shown in Figure 2. When he finished writing, he counted that there were 32 more letters in the first roll than the second roll. If all the letters are spaced equally, how many letters were there altogether?
