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Big arithmetic
An MCP tool from the Calculators server, hosted on mcp.hjlabs.in.
Exact arithmetic on whole numbers of any size: add, subtract, multiply, divide (quotient and remainder), power and modular power. Use when numbers exceed 2^53 and floating point would round.
Name on the gateway: math__big_arithmetic · read-only.
Parameters
| Name | Type | Description |
|---|---|---|
a required | string | First whole number, as text. |
op required | add | subtract | multiply | divide | mod | power | powmod | Operation. |
b required | string | Second whole number. |
m | string | Modulus, for powmod only. |
How to call it
Through the Smart Gateway, any client can run it by name with call_tool, or let the gateway find it with search_tools:
{
"name": "math__big_arithmetic",
"arguments": {
"a": "…",
"op": "…",
"b": "…"
}
}Or connect the Calculators server directly, which lists 28 tools including this one:
claude mcp add --transport http hj-math https://mcp.hjlabs.in/mcp/math \
--header "Authorization: Bearer YOUR_API_KEY"Try asking
Use the big arithmetic tool with a set to ….