quadruplicated

quadruple copied quadrupled four times reproduced fourfolded multiplied by four increased by a factor of 4 multiplied by 4-fold multiplied by 4x multiplied by a factor of four multiplied by four times as much multiplied by four times greater multiplied by fourfold multiplied by the number 4

quadruplexed quadruplexing quadruplicate quadruplication quadruplicity quadrupling