列式计算：,S2b1H.`6M9H1Q*\0].s8u
甲数是40，甲数是乙数的5倍，乙数是多少？,S2b1H.`6M9H1Q*\0].s8u
8T4n5T/O+?,M-S7{;X7P'v)Z,S2b1H.`6M9H1Q*\0].s8u