I guess five fold
Quintupled.
Quintuple is something consisting of five parts. It's like the watermelon was quintupled.
Quintipled means multiplied by five. 5 x 5 = 25
122 quintupled is 122*5=610. 610 in Roman numerals is DCX.
8x5=40
DCX (610)
CDLXXXVIII
122 x 4 = 488 CDLXXXVIII
101.59*x5/3approx.
In order: single, double, triple, quadruple, quintuple, sextuple, septuple, octuple, nonuple... etc. The prefixes are derived from latin number names.
Cxxii = 122122 × 5 = 610610 = dcx