Also, when converting from binary to hex (but not decimal), you can split the number into groups of four digits, starting from the right. In this case, 1011101 is represented as 101, 1101. Then you can convert each group into hex separately and then write the resulting hex digits in the same order. So if is, say, in hex, and is in hex, then the whole number is (not the product, just two hex digits written together).