C++ BigInt implementation
git clone https://github.com/tmargary/BigInt
cd BigInt
cmake -B build -S . -DCMAKE_TOOLCHAIN_FILE=[path to vcpkg]/scripts/buildsystems/vcpkg.cmake
cmake --build ./build
./build/tests/BigIntTest
BigInt a("123456789");
BigInt b("-987654321");
result = (a * b).toString(); // "-121932631112635269"