1) 320 (320+322+324=966)
2) 219 (215+217+219=651)
3) 452 (420+452=872)
А= 5820+4180=10000+23467=33467
б=15700+4300=20000+482387=502387
в=20*50=1000*3890=3890000
г=8000*500=400000*4673=1869200000
5√11 * 2√3 * √33 = √25*11*4*3*11*3= √25* 11 * 11 * 3 * 3 * 4 = 5 * 11 * 3 * 4 = 660