461×3.7×5.1×18÷（1.7×2）=461×3.7×（5.1÷1.7）×（18÷2）=461×3.7×3×9=461×11.1×9=461×99.9=461×（100-0.1）=461×100-461×0.1=46100-46.1=46053.9
