4.6x3.26+9.7x6.52
=4.6×3.26+9.7×（2×3.26）
=4.6×3.26+（9.7×2）×3.26
=4.6×3.26+19.4×3.26
=（4.6+19.4)×3.26
=24×3.26
=78.24