divAndAss method
Implementation
MathTime divAndAss( dynamic r ){
_update();
if( r is MathTime ){
double rr = r.toFloat();
_hour /= rr;
_min /= rr;
_sec /= rr;
_frame /= rr;
} else {
double rr = ClipMath.toDouble(r);
_hour /= rr;
_min /= rr;
_sec /= rr;
_frame /= rr;
}
reduce();
return this;
}