How do I input this into my calculator?

(1×2×3)+(1×2×4)++(1×2×100)+(1×3×4)+(1×3×5)++(1×3×100)+(1×4×5)+(1×4×6)++(1×4×100)++(98×99×100) \begin{aligned} &&(1 \times 2 \times 3) + (1 \times 2 \times 4) + \ldots + (1 \times 2 \times 100) \\ &+& (1 \times 3 \times 4) + (1 \times 3 \times 5) + \ldots + (1 \times 3 \times 100) \\ &+& (1 \times 4 \times 5) + (1 \times 4 \times 6) + \ldots + (1 \times 4 \times 100) \\ &+& \ldots \\ &+& (98 \times 99 \times 100) \end{aligned}

Let SS denote the value of the sum above. What is the last two digits of SS?

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