I found the solution. For example, for Cisco WLC APs:
secondsTimetick=snmpProtectedDiv(cLLwappUpTime, 100);
seconds = (secondsTimetick%60);
minutes = snmpProtectedDiv((secondsTimetick%3600), 60);
hours = snmpProtectedDiv((secondsTimetick%86400), 3600);
days = snmpProtectedDiv(secondsTimetick, 86400);
return snmpRound(days) + " days, " + snmpRound(hours) + " hours, " + snmpRound(minutes) + " minutes, " + snmpRound(seconds) + " seconds";