I keep getting this error when i try to store a value on sfStore :transact to StorageFactory.sfStore errored: Error encoding arguments: Error: invalid BigNumber string (argument="value", value="0.7", code=INVALID_ARGUMENT, version=bignumber/5.7.0)

[Cryptbits]

//SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

import "./Simple_Storage.sol";

contract StorageFactory {
//Creating a function that can deploy a simple storage contract
//Adding an array allows you to keep track of all your simple storage deployments
Simple_Storage[] public simpleStorageArray;

function createSimpleStorageContract() public {
    Simple_Storage simpleStorage = new Simple_Storage();
    simpleStorageArray.push(simpleStorage);
}

function sfStore(uint256 _simpleStorageIndex, uint256 _simpleStorageNumber) public {
    // Address
    // ABI - Application Binary Interface
    Simple_Storage simpleStorage = simpleStorageArray[_simpleStorageIndex];
    simpleStorage.store(_simpleStorageNumber);
}
function sfGet(uint256 _simpleStorageIndex) public view returns(uint256){
    Simple_Storage simpleStorage = simpleStorageArray[_simpleStorageIndex];
    return simpleStorage.retrieve();
}

}