If I climb Mt. Fuji once more, I'll have climbed it four times.

Literal

Mt. Fuji [to-に] one-more-time climb [if-ば] 4-times climbed experience [into-に] becomes [polite-ます].

~ば...ことになります: 'if I climb it once more, the result will be four times.' ~ことになる expresses a resulting situation. A clean example of conditional + consequence.