Can't figure this out, can someone help me with this method?

public static int findDecodeLength(String rleString) t * Computes the length of the decoded string of a given string in RLE format. * Parameters: *rleString - a string encoded in RLE format Returns: A length to store the decoded string *Examples: * findDecodeLength("2a2b2c")=> 6 * findDecodeLength('46 16X8uS")=> 29 * findDecodeLength("100Y17L")-> 117