ant-design/components/input-number/demo/prefix.tsx

import React from 'react';
import { UserOutlined } from '@ant-design/icons';
import { InputNumber } from 'antd';

const App: React.FC = () => (
  <>
    <InputNumber prefix="￥" style={{ width: '100%' }} />
    <br />
    <br />
    <InputNumber addonBefore={<UserOutlined />} prefix="￥" style={{ width: '100%' }} />
    <br />
    <br />
    <InputNumber prefix="￥" disabled style={{ width: '100%' }} />
  </>
);

export default App;